Density is mass/volume. What is the density of an object that has a mass of 15.4g and a volume of 7.1mL?

A.2.2
B.2.169
C.2.17
D.2

Smog is the term used to describe the combination of fog and smoke

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?